Hary Gahtoe

After calling 5 shops in my area I found a shop that does quality work.

The Shop Tech called me to ask some questions.
Turns out this particular car, an 04 wants not only the TCU replaced but the entire valve body. That's why I got locked out of the SDS SCN encoding process i had tried earlier. He showed me the screen. The car was requiring a valve body swap when changing the conductor plate.
So; my query is IF I can resolder the broken connections on my original board, Could you fool the main ECU into believing the replacement is the original? Or send the rebuilt virginized board back and buy a new MB blank with no guaranty it''ll still ask for a valve body. OR do I just just buy another valve body and just finish out coding of the replacement?
The tech was an MB rep and was going to put in a call to his old regional service rep he is friends with
This going to take some technical background searches.

Thanks for any replies

Russell Ormerod

Xentry has no way of knowing its an old valve body. It checks the EHS number that u enter. Be more specific how its blocking u.. what car?
Fooling it is easy.. will the car drive properly is another issue

Hary Gahtoe

It's an R230 500 built in Feb 04 and these are the pages the tech showed me

Hary Gahtoe

No, initial startup gets 1-2-3 and then stays in 3rd but reverse is available

Russell Ormerod

If you repaired your orignal part then u can use your old valve body. A later version plate needs a new valve body to function correctly

Hary Gahtoe

1. I bought a virginized plate because the original was way beyond repair
2.Company sold me the replacement NAG2 same as original
I think i know why the SDS system is asking for a plate/valve body. How would the TCU know the changed out valve body was a replacement or the original is my question? It has no electrical connection to the car, purely mechanical.
Knowing only small amount about programming it would make sense they built that 3 way junction at that point incase the SDS doesn't see error codes from the plate and/ or a later plate was tried.
So;
Plate is same Gen as original
Valve body was fine no issues
Original plate throwing constant Internal sensor/Turbine sensor error codes
New plate was stopped at C1519 / C15EF by SDS and aborted entire encoding
Shop erases all error codes and begins encoding only to be stopped at an SDS mandated decision junction

FWIW Neither chassis or trans codes on the car are listed in the onscreen replacement categories

Russell Ormerod

It doesn't know. But it needs to be compatible for the gearbox to function correctly.. Also you need to enter the EHS number (valve body) Before you flash the new control unit.

Hary Gahtoe

Already did that Russell but thank you

Russell Ormerod

So.. is it fixed?

Hary Gahtoe

No. I resoldered the original plate and gave it to the service tech today hoping he could pull all the hard info off my plate.
Update:
I got a call from the tech and we reached a solution.
The MB regional Tech Supervisor confirmed the screen cap. It takes a Blank MB plate specifically for my VIN not just a virginized rebuilt even of the same generation

Thanks
Hary

Russell Ormerod

Do you have comms with the original unit?
Then it's easy to read the scn and variant string!

If your rebuilt unit is of the same part number as the original
Then you can flash it and use the same scn coding. If not then buy a new valve body!

Hary Gahtoe

If you'd read my posts before you reply You'd realize your posts aren't relative in my particular situation.

Situation has been remedied but thanks anyways

Russell Ormerod

I did read them and you make no sense, but glad you are sorted